Accession Number:

AD1096845

Title:

Resonant Cavity Infrared Detector with Five Quantum-well Absorber and 34% External Quantum Efficiency at 4 Micro(meters)

Personal Author(s):

Corporate Author:

Naval Research Laboratory Washington United States

Report Date:

2019-02-01

Abstract:

We report resonant-cavity infrared detectors with 34 external quantum efficiency at room temperature at the resonant wavelength of 4.0 mu m, even though the absorber consists of only five quantum wells with a total thickness of 50 nm. The full width at half maximum FWHM linewidth is 46 nm, and the peak absorption is enhanced by nearly a factor of 30 over that for a single pass through the absorber. In spite of an unfavorable Shockley-Read lifetime in the current material, the dark current density is at the level of state-of-the-art HgCdTe detectors as quantified by Rule 07. The Johnson-noise limited detectivity D at 21 degrees C is 7 x 109 cm Hz12W. We expect that future improvements in the device design and material quality will lead to higher quantum efficiency, as well as a significant reduction of the dark current density consistent with the very thin absorber.

Descriptive Note:

Journal Article - Open Access

Supplementary Note:

Optics Express , 27, 3, 01 Jan 0001, 01 Jan 0001, [ 1 ] Naval Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA[ 2 ] KeyW Corp, Hanover, MD 21076 USA

Pages:

0011

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Distribution Statement:

Approved For Public Release;

File Size:

1.90MB

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